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"The study of methods of optimization of the program code at the cost of CPU
Содержание
- 1. "The study of methods of optimization of the program code at the cost of CPU
- 2. Process optimization codeOptimization - a transformation in
- 3. Constant folding («свертывание констант») One of the
- 4. Common Sub-Expression Elimination (CSE) (Устранение общих подвыражений)
- 5. Performing arithmetic operations on variables of different
- 6. The aim of the study was to
- 7. The aim of the study was to
- 8. Скачать презентанцию
Process optimization codeOptimization - a transformation in which the result of the system remains unchanged, but improve some of its characteristics. The most common goals of optimization when developing the code:
Слайды и текст этой презентации
Слайд 2Process optimization code
Optimization - a transformation in which the result
of the system remains unchanged, but improve some of its
characteristics. The most common goals of optimization when developing the code: reduce the execution time of programs, improve performance, compactification of code, memory consumption, minimizing energy consumption, reducing the number of input / output.
Слайд 3Constant folding («свертывание констант»)
One of the common optimizations in
the compiler is "constant folding". In the process of performing
this action in program code are the constants in the resulting code consists of the calculated values.Integrated methods for optimization of programs
Слайд 4Common Sub-Expression Elimination (CSE) (Устранение общих подвыражений)
This optimization is
the following: if you use the calculation of any expression
two or more times, it can be calculated once and then to substitute all uses of its expression.Integrated methods for optimization of programs
Слайд 5Performing arithmetic operations on variables of different types
Comparison of execution
time of commands s = a*0.5 and s = a/2
The aim of the study was to determine which of the basic arithmetic operations on variables of different types are faster. Also need to find out how the performance of an operation depends on the type of the operands.
Слайд 6The aim of the study was to test the effect
of the method of passage when processing two – dimensional
arrays by rows or by columns.Intended result: Since the array dimensions are the same, and the number of elementary operations when working with the cells of the array is also the same, then the difference in the way traverse the array should not occur.Fill the array
Слайд 7The aim of the study was to verify the herniation
of the choice of branching statements (If-then-else statement and multiple-choice
Case) on the speed of the program.Branching statements
